Noise-making alarm



July 19,1927.

F. DAvls l NOISE MAKING' ALARM Filed July 30, 1925` nyl/ENToR.

Patented July 19, 1927. Y

UNITED STATI-is PATENT emes, v

rmx Davis, or BROOKLYN-,NEW aromi.`

NOISE-MAKING ALARM,

Application mea muy so, `1925. seriei'No. 47,037. n

notherbbjeet of thepresent `invention is to provide Va sound' alarm mechanism wherein'use is made of two sound intonators seus er 'are 11a-the 'Cumulative ringing 0i which results in producing a louder, more 4especially where the soundproducer is in `continuous operation, as is contemplated by the present invention.,

A still further object ot the present invention isto provide a burgla-rand holdalarm or fire alarm designed to be rendere audible at reater distance than is now found practicableby ordinary sound producers.l In carrying outl the present invention it is proposed to employ a inotor referably an electrical motor with suitab e connections Yto operate a clapper .which engages oscillatingly` with two sound intonators, of preferably different timbre, size and inflection, thereby combiningthe two sounds in a louder sound-` The rapid revolutions made er minute by the motor'results in motion eilig` imparted sharply and abruptly to the clapper which responds with blows repeatedl made upon the two 1ntonators.

Asti l further object of the present invention is to provide in connection with a sound producer or intonator means for delivering a steady, rapid, loud, and alarm-conveying signal powerful enough to attract instant attention whenever vvis heard, and lthereby serving to bring'succor andaid to distressed vpeople in any oilice, shop, o rdbuilding 1n which the alarm may befstationed.

With the above and other objects in view my invention consistsfin the combination, construction and details disclosed in the specification and drawings and then morev ,appended particularly pointed out in the claims. y ,I C y In the drawings which are merely illustrativeo my invention enclin which similar reference characters'designatefsimilar parts thruout the respective views,

- Figure 1 is a side elevation, partly in section'fofrtlie parts of my invention, Figure 2" is" a perspective view fm'y'in'- Vlltlh,

lFigure Bris a vertical sectional' elevation thereof U j Figure fi is a `perspective view ofthe clappe'r operating mechanism, `and igur'e '5y isa detail fragmental View of clapper actuating mechanism. distinct and harsher sound than `either alone,

In the drawings 10 designates afsuitable basebOa-rd made preferablyv of insulating material, and '11 indicates' two uprights of a frame orsupport secured upon the `opposing ends 'of said baseboard. Connecting longitudinally the upriglits is a horizontal 12 uponwhich are operatively suspended preferably two sound intona'to'rs, bells, or

the housing wherein is shown a part of the inverted metal drums, one intonator being"` bigger, and harsher in `sound than the other` and' of a 'dii'erent' timbre, so that the sounding of both of them atthe' same time by a rapidly operating striker is calculated to Vproduce a louder resultant noise, suiiiciently prolonged to cause an alarm, for any desired purpose.

L Thebells 13 and 14 are separated 'apart leaving a space 12a `in which means projects for engaging 'both bells to ring them; said Ymeansbein ja striker or clapper 28 hereinafter descri ed. Bolts15 and securin .nuts

1:6 serve as the means of fastening the ruins uponthe frame bar 12. `AV suitable motor, l'preferably an electricalmotor 17 is also vsecured-down upontlie base-boardY and is included in an' electrical'circuit adapted to 'be closedas by a switch (not shown),V The [motor shaft .n.18 is capable of undergoing several `thousand revolutions' perl minute, and

` vcarries a crankpin 19 upon which is pivoted a connecting 'red 2O which is pvotally `connected `itsbiiiurcated portion or arm 21 at 22"l to a reciprocating member or slidable actuatorlQB which is suitably dovetailed or votherwise slidablyv` guidedin a'housing or 'guide 23` mountedvupon a' pedestal '29 se- .cuiiedupon the baseboa'rd 10. 1V A bent lug 221 'secured fiat against the plunger or lslidloo' Ynoise Ato ensue.

able member 23 and carries an arm 25 at right angles with respect to the housing 23a. Secured in upwardly extending relation upon the end of arm 25 is a clapper or striker ol resilient metal terminating at its uppermost extremity in a ball or other' impact making part 28; this ball being designed to alternately and successively engage and strike both bells 13 and 14, when inoperation.

The device is strongly built withal frame 30 projecting immediately. above theball 28 of the clapper to assure the proper release of the sound waves between both `bells and to interrupt the waves so as to causea blunt Suppose this alarm to be located in an office equipped with suitable circuit makers, and that the latter are operated upon the happening of some unexpected nefarious doing such as a hold-up during daylight. Instantly thecircuit is closed to the motor 17 which immediately rotates shaft 18 caus ing the -slidable actuator 23 to be rapidly and repeatedly successively reciprocated for the purpose of in turn reciprocating the arm 25 and with it the clappe'r arm 27, causing thefclapper ball to rapidly vibrate and alternately strike the bells 13 and 14, merging their sounds in one blunt, savagely loud distinct noise audible at great distances from -the scene of the hold-up and serving thereby to convey an eilective alarm to policemen or others who may be attracted to the office lwhere help is quickly needed.

I claim all mechanical changes coming within the purview of the appended claims.

What I claim and seek to protect by Letters Patent is l 1. In an alarm mechanism, a pair of spaced sound producers, a slidably reciprocable actuator beneath said sound producers, means for guiding the movements of said actuator, an upstanding resilient striking arm carried b y said actuator substantially at the middle thereof to extend upwardly between said sound producers, said arm having an impactor on its free end, a power driven crank and connecting arm for operating said actuator whereby the reciprocation thereof i rapidly vibrates said resilient arm to forcefully ino-re said impactor in alternate sounding contact with said sound producers.

2. In an alarm mechanism, a pair ot spaced sound producers, a slidably reciprocable actuator beneath said sound producers, means vfor guiding the movements Aof said actuator, an upstanding resilient striking arm carried by said. actuator to extend upwardly between said sound producers, said arm having an impactor von its free end, a comparatively high speed electric motor having a crank member in connection with its armature shaft, a connectin rod between said crank member and sai actuator, all

whereby said actuator is rapidly reciprocated to vibrate said resilient arm and forcefully move said impactorin alternate sounding contact with said sound producers.

3. In an alarm mechanism, a pair of spaced sound producers, a reciprocable actuator beneath said sound producers to move in horizontal plane, guide means for said actuator, an 'upstanding resilient striking arm carried by said actuator substantially at the'iniddle thereof to extend upwardly betweenlsaid sound producers and arranged to vibrate in vertical plane, said arm having an impactor on its free end,and means for rapidly reciprocating saidactuator to in turn vibrate said striking arm whereby said impactor. is forcefullycarried in alternate sounding contact with said sound producers.

4;. In an alarm mechanism, a pair of spaced sound producers, a reciprocable actuator beneath said sound roducers to move in horizontal plane, gui emeans `for said actuator, an upstanding resilient striking arm carried by said actuator to extend upwardly between said sound producers and arranged to vibrate in vertical plane, said arm having an impactor on its free end, a comparatively high speedelectric motor having a crank member in connection with its armature shaft, a connectingrod between said crank member and said actuator, all whereby said actuator is rapidly reciprocated to vibrate said resilient arm and forcelully move said iinpactor in alternate sounding contact with said sound producers.

5. In an alarm mechanism, a base, a frame-work rising from said base, a pair of gong-like sound producers suspended from said frame-work above said base and spaced slightly apart, a reciprocable actuator beneath said sound producers, guide means mounted on said base to operatively mount said actuator for reciprocable sliding movement in horizontalplane, an upstanding resilient striking arm carried by said actuator substantially at the middle thereof to extend upwardly between said soundv producers and varranged to vibrate in vertical plane, said arm having an iinpactor on its free end, and means for rapidly reciprocating said actuator to in turn vibrate said striking arm whereby said impactor is forcefully carried in alternate sounding contact with said sound producers.

6. In an alarm mechanism, a base, a -framework rising from' said base, a pair of gong-like sound producers suspended from said frame-work above said base and spaced slightly apart, a reciprocable actuator beneath said sound producers, guide means mounted' on said base to operatively mount said actuator for reciprocable sliding move- `ment in horizontalplane, an upstanding resilient striking arm carried by said actuator to extend upwardly between said sound pro- )lane saicl arm havinnr an im )actor on its free end, a comparatively high speed electric motor having a crank member 1n connection with its armature shaft. a connecting rod between said crank member and said actuator, all whereby said actuator 1s rap1dly reciprocated to vibrate said resilient arm and forcefully move said impactor in alternate sounding Contact with said sound producers. 1

In Witness whereof he has hereunto set his hand this'eleventh day of July, 1925.

FRANK DAVIS. 

